Objective
Bond two DS1s (T1s) together for 3Mb bandwidth. 2 VLANs that need to certain access to other subnet’s resources such as printing.

Layout
Carrier: Level 3
Router at Customer Site:
Cisco 1841 (running 12.4 IOS)
Switches at Customers Site:
2 Cisco 3500 (running 12.2 IOS)
Building One:
40 Users
Building Two:
12 Users
This is what I have for a router config. It has been working 3 months no issues. I took out the ACLs for this output. (Still on the router but not here)

For some time I have created ACL Standard or Extended. Then six months to a year later after creating the ACL the customer wants me to update or check to see what this does and when was the ACL applied. Named ACL really help. I know the date and how many changes in the date I update the Named ACL. Please use a text editor for all changes. Cisco recommends this.

Example:

ip access-list extended Ban_Sept_25-2007e
deny ip host 64.235.213.22 any
deny ip host 207.138.82.130 any
deny ip host 209.170.119.67 any
deny ip host 64.116.204.140 any
deny ip host 63.211.225.83 any
deny ip 8.6.12.0 0.0.0.255 any
deny ip 64.74.0.0 0.0.255.255 any
permit ip any any

Copy IOS for Flash card to Flash Card.

copy slot0: slot1:

cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc

This works great, howerver, if you type delete xxx file it will not clear the blocks on the card.  I had to format (format slot1:) in order for me to copy the IOS on to the card.  When I type delete it would not free up space on the card.

I use kermit with a USB serial to USB cable.

kermit

set line /dev/ttyUSB0

set speed 9600

set stop-bits 1

set parity none

set flow control none

set carrier-watch off

connect

Same for windows Hyperterminal.

once the router boots to rom

rommon 1> confreg 0×2142 (make sure your router has this)

rommon 2> reset

then once the router reboots then a setup will occur.

do a config t

Using the current technologies with VMWare, Windows, and Cisco, it is possible to have a live backup at an alternate location. The link below show a demo Viso layout of Windows 2003 Doman Controllers and SQL running a cutomers location and being repicated over a T1 to a hosting company. This aritcle will be update from time to time to get results of T1 usage and how VMWare performs.

Demo Layout